California's political watchdog agency is proposing a $2,500 fine against the campaign of former Facebook executive Chris Kelly, who lost a bid for attorney general in 2010.

The Fair Political Practices Commission says Kelly for Attorney General 2010 and its treasurer, Jane Leiderman, failed to file sub-vendor payments in a timely manner for more than $9.9 million in expenditures before that year's primary.

The commissions' board will consider the proposed fine during its May 16 meeting.

Kelly lost the Democratic primary to Kamala Harris, who went on to win the seat. He also funded a successful 2012 ballot initiative, Proposition 35, which toughened penalties for human trafficking and monitoring of sex offenders.

He is among a group of investors seeking to purchase the Sacramento Kings basketball team.